* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

ul {
    padding: 0;
    list-style: none;
}

a {
    text-decoration: none;
    color: #333;
}

img {
    width: 100%;
}

h4 {
    font-weight: normal;
}

.clearfix::after {
    content: "";
    display: block;
    clear: both;
}

.courses-wrap {
    margin: 20px 45px;
    width: 1200px;
    height: 100px auto;
}

.course-tab {
    height: 52px;
    margin-left: 5px;
    padding-left: 15px;
    margin-bottom: 20px;
    border: 1px solid#efefef;
    background: #f5f5f5;
}

.course-tab .tab-item {
    float: left;
    height: 50px;
    margin-right: 40px;
    line-height: 50px;
}

.course-tab .course-tab-lk {
    font-size: 14px;
}

.course-tab .course-tab-lk.current {
    color: #167ed9;
}

.course-card-list-wrap {
    margin-left: 55px;
    width: 1200px;
    height: 500px;

}

.course-card-list-wrap .course-card-list {
    margin-left: -15px;
    width: 1225px;
    height: 500px;

}

.course-card-list-wrap .card-item {
    float: left;
    width: 232px;
    height: 200px;
    margin: 0 0 20px 9px;
    /* border: 1px solid #000; */
}

.card-item div {
    width: 100%;
    height: 100%;
}

.course-card-list-wrap .card-item .img-lk {
    display: block;
    width: 220px;
    height: 124px;
    margin-bottom: 6px;
}

.course-card-list-wrap .card-item .item-status {
    position: relative;
    z-index: 1;
    margin-top: -30px;
    width: 95%;
    height: 24px;
    background-color: rgba(0, 0, 0, .5);
    color: #fff;
    font-size: 12px;
}